STRESS-STRAIN HYSTERESIS OF Cu-Zn-Al POLYCRYSTALLINE SMAs─Ⅱ: EXPERIMENTS AND NUMERICAL SIMULATIONS

1.IntroductionAsasmartmaterial,manyapplicationshavebeenfoundforshapelllellioryalloys(SMAs)lllz],sincethealloyscanprovidearelativelargerecoverystressandrecoverystrainuponheating.Itisimportalltinsomeapplicationstocalculatetherecoverystressandtherecoverystrainandtoestimatethetemperatllre,atwlliclltherecoverytakesplace.Tillsrequiresabetterunderstandingofthestress--strain--temperaturerelationofSMAs.Amodelhasbeenproposedl3]forthetemperature--dependentstress--strainhysteresisofSMAs.Itwasintendedt…